hg: amber/amber: add final flag to mandated record member toString

[vicente.romero at oracle.com]

Changeset: 2cb1afc52e6b
Author:    vromero
Date:      2020-03-05 19:22 -0500
URL:       https://hg.openjdk.java.net/amber/amber/rev/2cb1afc52e6b

add final flag to mandated record member toString

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java
! test/langtools/tools/javac/records/RecordCompilationTests.java